Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.geoderma.2025.117284 |
Lizenz  |
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| Titel (primär) | Adsorption/desorption processes dominate the soil P fractions dynamic under long-term N/P addition in a subtropical forest |
| Autor | Peng, C.; Wang, S.; Zhu, Y.; Li, A.; Yu, G.; Mao, Q.; Zheng, M.; Huang, J.; Tan, X.; Mo, J.; Zhang, W. |
| Quelle | Geoderma |
| Erscheinungsjahr | 2025 |
| Department | BOOEK |
| Band/Volume | 457 |
| Seite von | art. 117284 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0016706125001223-mmc1.docx |
| Keywords | Soil P fractions; P limitation; N deposition; P addition; Subtropical forest |
| Abstract | Despite large phosphorus (P) reserves in subtropical forest soils, P limitation can be exacerbated by elevated atmospheric nitrogen (N) deposition. However, the mechanisms underlying how soil P fraction transformation affects P availability and the key factors that regulate this process under long-term N and/or P addition remain unclear. In this study, in a subtropical forest subjected to 13 years of continuous simulated N and/or P addition, we investigated the response of soil P fractions by modified Hedley P fractionation to long-term fertilization, and how soil geochemical including absorption or desorption with Fe3+, Al3+ and biological processes such as mineralization by phosphatase and assimilation by microorganisms regulate P transformation. We found that N addition significantly increased the Moderately Labile P but did not affect the Labile Pi (inorganic P) and Labile Po (organic P) fractions. These changes were primarily regulated by the promoted geochemical processes, such as Fe3+ (+57.49 %) and Al3+ (+11.20 %) adsorption. However, several soil biological indicators regulating organic and inorganic P transformation, including phosphomonoesterase activity (PME), significantly decreased under long-term N addition. With long-term P addition, Moderately Labile P (contributing to 69 % of the total P increment) was the main destination of the added P, facilitated by the exchange of PO43- with soil organic carbon (SOC) at absorption sites. These findings suggest that soil adsorption/desorption processes dominate the transformation of P fractions in subtropical forests, under both N and P addition. Our findings highlight the importance of P adsorption and desorption processes in highly weathered subtropical forest ecosystems to better understand P transformation mechanisms under global change scenarios. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=30704 |
| Peng, C., Wang, S., Zhu, Y., Li, A., Yu, G., Mao, Q., Zheng, M., Huang, J., Tan, X., Mo, J., Zhang, W. (2025): Adsorption/desorption processes dominate the soil P fractions dynamic under long-term N/P addition in a subtropical forest Geoderma 457 , art. 117284 10.1016/j.geoderma.2025.117284 |
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